My Best Friend's Sister

Matt Porter was expecting his summer to be just like they usually are - he and his friends go up to a beach house and stay there for a few months to party and hang out. But this summer is going to be completely different. Sure, there's still parties, and he's still hanging out with his friends. But one thing Matt didn't count on was his friend's sister, Hannah Bradley, to be staying with them too. She and Matt get close, that is, until big-brother Liam Holmes notices what's going on between the two, and declares his baby sister as "off limits". With that said, what happens to Matt and Hannah's relationship? Does it secretly continue, or do they end it right there and then?